Copper based transparent solar heat rejecting film on glass through in-situ nanocrystal engineering of sputtered TiO2. Issue 2 (15th January 2022)

• Record Type: Journal Article
• Authors: Nawade, Ashwini; Ramya, Kunchanapalli; Chakrabortty, Sabyasachi; Bamola, Priyanka; Sharma, Himani; Sharma, Mohit; Chakraborty, Krishnendu; Ramakrishna, Seeram; Biring, Sajal; Shun Wong, Terence Kin; Kumar, Avishek; Mukhopadhyay, Sabyasachi; Dalapati, Goutam Kumar
• Is Part Of: Ceramics international. Volume 48:Issue 2(2022)
• Page Start: 2482
• Page End: 2491
• Publication Date: 2022-01-15
• Subjects: Transparent heat regulation (THR) -- TiO2/Cu/TiO2 -- In-situ engineering -- TiO2 nanocrystal -- Infra-red reflection -- Solar film on glass; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.10.030
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Sputter grown copper (Cu) and titanium dioxide (TiO2 ) based transparent solar heat rejecting film has been developed on glass substrates at room temperature for energy saving smart window applications. The performance of as-deposited ultra-thin TiO2 /Cu/TiO2 multilayers was elucidated, wherein the visible transmittance of the multilayer significantly depends on the crystal quality of TiO2 layers. In-situ nanocrystal engineering of TiO2 films with optimized sputtering power improves crystallinity of nano-TiO2 domains. The transparent heat regulation (THR) coating with an average transmittance of ∼70% over the visible spectral regime and infra-red reflectance of ∼60% at 1200 nm was developed at room temperature. Optical characterization, X-ray diffraction (XRD), high resolution-transmission electron microscopy (HR-TEM) and atomic force microscopy (AFM) have been utilized to analyze the crystallinity of TiO2 and quality of the multilayered structure. TiO2 /Cu/TiO2 based prototype device has been demonstrated for the energy saving smart windows application.